Circuit/System Testing (Navigation Radio)
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the GPS antenna coax cable from the navigation radio.
- Ignition ON, test for 4.5-5.5 volts between the coax cable connection center conductor at the radio and ground.
- If not within the specified range, replace the radio.
- If all circuits test normal, replace the GPS antenna.